A Lignin-Containing Cellulose Nanofiber, a Paper and a Film Comprising the Said Lignin-Containing Cellulose Nanofiber

Pending Publication Date: 2020-10-22
SCG PACKAGING PUBLIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a lignin-containing cellulose nanofiber that can effectively reduce energy usage in mechanical treatment and increase the modulus of elasticity, tensile strength, and strain at break of the resulting film. This improvement is accomplished while maintaining the beneficial properties of the cellulose nanofiber, such as its biodegradability and flexibility.

Problems solved by technology

Generally, a cellulose nanofiber can be prepared by separating the cellulose nanofiber from wood pulp by using a mechanical disintegration method, but such method requires high energy which results in high production costs.
However, even though there have been efforts to develop production processes of lignin-containing cellulose nanofiber as shown in the above examples of prior arts, the overall production processes still mainly use mechanical process without having disclosed a pretreatment of wood pulp using chemical treatment to obtain pulp suitable for treating with such mechanical process.
In addition, the prior arts did not disclose lignin-containing cellulose nanofiber, whereby lignin has a suitable dispersion both inside fiber and at the fibrous surface area.

Method used

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  • A Lignin-Containing Cellulose Nanofiber, a Paper and a Film Comprising the Said Lignin-Containing Cellulose Nanofiber
  • A Lignin-Containing Cellulose Nanofiber, a Paper and a Film Comprising the Said Lignin-Containing Cellulose Nanofiber
  • A Lignin-Containing Cellulose Nanofiber, a Paper and a Film Comprising the Said Lignin-Containing Cellulose Nanofiber

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examples

[0118]The following will further explain the present invention by way of examples. However, these examples are not considered as limiting the scope of the present invention.

[0119]1. Preparation of Lignin-Containing Cellulose Nanofiber

[0120]Examples of lignin-containing cellulose nanofiber according to this invention can be prepared by mixing semi-chemical pulp with water in a content of 2% by pulp weight. Then, subjecting the resulting mixture(s) to a pulp disintegrator and thereby subjecting the obtained pulp to a process comprising the following steps:[0121](i) extracting a semi-chemical pulp with different types of solvents as shown in Table 1[0122](ii) subjecting the said extracted semi-chemical pulp to an oxidation by using 4-acetamido-(2,2,6,6-tetramethylpiperidine-1-oxy radical) and reacting with sodium hypochlorite, and[0123](iii) subjecting the pulp subjected the reaction in the step (ii) to a mechanical grinding using high pressure homogenization.

[0124]2. Analysis of Chara...

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Abstract

The present invention relates to a lignin-containing cellulose nanofiber characterized in that (a) the said lignin-containing cellulose nanofiber has a content of carboxyl group in a range of 0.2-1.5 mmol / g, (b) the said lignin-containing cellulose nanofiber has Zeta potential in a range of −100 to −35 mV, and (c) the said lignin-containing cellulose nanofiber has an average diameter in a range of 3-30 nm. In addition, the present invention further relates to a paper and a film comprising the said lignin-containing cellulose nanofiber. The present invention also relates to a process for preparing a lignin-containing cellulose nanofiber comprising steps of (i) treating a lignin-containing cellulosic material with an organic solvent, (ii) treating the cellulosic material treated from the step (i) with derivative of N-oxy radical compound and hypochlorite compound, and (iii) mechanical treating the cellulosic material treated from the step (ii).

Description

FIELD OF THE INVENTION[0001]This invention is in a chemical field relating to a lignin-containing cellulose nanofiber, a paper and a film comprising the said lignin-containing cellulose nanofiber.BACKGROUND OF THE INVENTION[0002]A cellulose nanofiber produced from wood pulp is considered as a highly efficient natural reinforcing material which is used to produce various products to increase strength; for example, as an additive in paper or used to produce film, etc.[0003]Generally, a cellulose nanofiber can be prepared by separating the cellulose nanofiber from wood pulp by using a mechanical disintegration method, but such method requires high energy which results in high production costs. Therefore, to reduce the use of energy in separating cellulose nanofiber from wood pulp, currently, there is an effort to create and develop new cellulose nanofiber preparation methods; for example, subjecting wood pulp to a chemical pretreatment or an enzymatic pretreatment to prepare a structur...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08L97/00D21H11/20D21H11/18D21B1/02D21H11/02D21C9/14D21C3/20D21H19/34
CPCC08L97/005C08L2205/16C08L1/02B82Y40/00D21C3/20D21H11/02D21H11/18D21B1/021B82Y30/00D21H11/20D21C9/14D21H19/34C07G1/00C08H6/00D21H27/10D21H19/02D21H19/54D21H19/52D21H19/18
InventorRUJITANAROJ, PIM-ONTHITIWUTTHISAKUL, KASINEETINNASULANON, PHUNGJAIBOONFUENG, THIPNAKARINLAOCHAROEN, NIKORNROJAS, RAMIROBERGLUND, LARS
OwnerSCG PACKAGING PUBLIC CO LTD